minorikawa



N. MINORIKAWA.

STOKING APPARATUS.

APPLICATION FILED MAY7, 1917.

1,346,379. Patented uly 13 1920.

3 SHEETS-SHEET l.

wuemtoz N. [VHNORIKAWA STOKING APPARATUS.

APPLICATION man MAY 7, 1911.

Patented July 13, 1921) 3 SHEETSSHEET 2- IJ? g U7 W I APPLICATION FILED MAY 7, 1917.

N. MINORIKAWA.

STOKING APPARATUS.

TJ 3 W1 4 4% Ch j L; 1 ILUEL Z W? V Patented July 13, 1920 3 SHEETSSHEET 3.

Swan whoa NAOSABURO MINORIKAWA, 0F TOKYO, JAPAN.

STORING APPARATUS.

Specification of Letters Patent.

Patented July 13, 1920.

Application filed May 7, 1917. Serial No. 166,936.

To all whom, it may concern:

Be it known that I, NAOSABURO MINOR:- KAWA, a subject of the Emperor of Japan, residing at No. L Hatsunecho, Koishilrawa- Ku, city of Tokyo, Japan, engineer, have invented certain new and useful Improvements in Stoking Apparatus, of which the following is a specification.

This invention relates to improvements in grates for furnaces for steam boilers and the like, one object of the invention being to effect improvements in the construction of the grate bars; another object being to effect improvement in the construction of the section arranged in the spaces between the grate bars, and another object being to provide improved means for shaking out the ashes and removing the clinkers without'disturbing the lumps of unburned coal on the grate bars.

With the above and other objects in view the invention consists in the construction, combination and arrangement of devices hereinafter described and claimed.

In the accompanying drawing:

Figure 1 is a longitudinal sectional view of the flame tube of a boiler provided with my improved grate.

Fig. 2 is a longitudinal horizontal sectional view of the same showing some of the sections in place and also showing some of the grate bars in plan without the sec tions.

Fig. 3 is a vertical transverse sectional view of the same.

Fig. d is a sectional plan of a modification of my invention.

Fig. 5 is a detaii vertical sectional view of the same.

Fig. 6 is an elevation of one of the sections, constructed in accordance with a modification of my invention.

Fig. 7 is a detail longitudinal sectional view of a portion of'one of the bars show ing the form of the rod 17.

Fig. 8 is a transverse sectional view of portions of two of the bars and showing the racking attachment and its means of support.

In accordance with my invention, each grate bar 1 has a centrally arranged slot 3 which extends from end to end and also from top to bottom of the bar. On the outer side of the bars, at their lower edges, are flanges 3. Sections l are arranged between the grate bars, at right angles thereto, and

thereupon and are supported by the flanges d, the said sections beingreadily removable from between the grate bars and being adapted to be readily lifted therefrom. Each iGCillOll has a centrally arranged opening 4t for the passage of air and is also provided on opposite sides, at the edges, with flanges i the said flanges serving to space the secp ons somewhat apart to form air passages oetween them, as shown in Fig. 2. The upper ends of the sections maybe semi-circular 1n fo rm as shown in Fig. 3, or they may be or triangular form as shown in Fi 6. Each section 4 has a lower extension which progects below the grate bars and is proyided with openings 16, 18.

The openings 18 of the various sections are in ahnement with one another and are arranged for the reception of a straight red by means of which the sections can be arranged in the required normal position. A. bent work ng bar or rod 17 can be inserted irom the front end of the furnace through the opening 16 to move the sections up and down 1n a wave-hire movement, accordin to the shape of said working rod, and t3 thereby thoroughly dislodge ashes from between said sections.

Each grate bar has guide flanges 2 on the nner side of its walls, at opposite sides of its slot 3. Each guide flange has an elevated central portion 2 at the upper side of the bar, has oppositely inclined depending port1ons2 near its end and has lower, horizontal end portions 2. Above the said end portlons 2", and spaced therefrom, are covermg flanges 6, guideways 7 being formed be tween the inner ends of said covering flan es and the inclined portion of said flanges 2, as shown clearly in Fig. 1. The side walls of the grate bars are provided at points near the front ends of the grate bars with downwardly extending portions 13. Rollers 14: are revolubly mounted between the portions 13 as shown. A raker 12 may be arranged and operated on any one of the rollers 14 and has an upturned Portion at its inner end to extend up into a slot 3 and which is pro ided with an enlarged head 11 to bear and slide on the guide flanges 2. hen the ralrer is moved lengthwise back and forth said guide flanges serve to guide the head 11 and cause the same to thoroughly dislodge the ashes and clinkers, the ashes falling downwardly through the slot 3 and the clinkers falling through the guide-ways 7 and drop the spaces between them.

ping from the ends of the grate bars at points under the covering flanges 6, as will be understood. e

In the form of the invention shown in Figs. 4L and 5 some of the sections 4 are omitted at the inner ends or" the grate bars, to provide openings between the grate bars through which ashes can readily drop, a transverse bar 9 is provided which is arranged on the inner end of the grate bars and covering bars 10 are arranged on said transverse bar and above the grate bars and ,Having thus described my invention, 1 claim: 7 1. A grate bottom comprising longitudi- -nal1y arranged bars spaced apart having flanges on their opposing sides, and removable sections arranged at right angles to'the grate bars, in the spaces betwe'en the grate bars and bearing onand'supported by said flanges. 2. A grate bottom comprising longitudinally arranged bars spaced apart and having flangeson their opposing sides, and removable'sections arranged at right angles to the grate bars, in spaces between the grate bars and bearing on and supported by said flanges, said sections having flanges on their opposing sides Which serve to space said sections apart to form openings between them. i

3. A gratebottom comprising longitudinally arranged bars spaced apart and having flanges on their opposing sides, and removable sections arranged at rightrangles to the grate bars, in spaces between the gratebars and bearing on and supported by said flanges, said sections having flanges on their opposing sides which serve to space said sections apart to form openings between them, and said sections also having air openings therein. 7 s

4. In a grate of the character described, longitudinally arranged grate bars having flanges on their opposing sides, and sections in the spaces between the grate bars :and bearing onand supported by said flanges, said sections being removable independently of each other and being: also verticaliy movable between the grate bars andxbeing further provided with openingsior the reception of a rod wherewith to impart vertical reciprocating motionto said sections.

5. In a grate of the character.described,

longitudinally arranged grate bars having flanges on their opposing-sides, and sections in the spaces between the grate bars and bearing on and supported by'said flanges, said sections being removable independently of each other and being also vertically inevable between the grate bars and being :Enrther provided with openings for the reception of a rod therewith to impart vertical reciprocating motion to said sections, the said openings of the respective sections being arranged at different elevations.

In testimony whereof I atfix my signature in the presence of two witnesses.

NAOSABURO MiNonrKAwA;

Witnesses: I i i H. YASUMUSA, HARRY FRANKLIN HAWLEY. 

